Analysis of recent Antarctic plate kinematics based on GNSS data

Savchyn, I.; Brusak, I.; Tretyak, K.

doi:10.1016/j.geog.2022.08.004

Cited by 6 publications

(3 citation statements)

References 35 publications

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“…A detailed description and practical application of the algorithm for determining the rotation poles of tectonic plates based on measurements of continuous GNSS stations is presented in Savchyn (2022a;2022b;2022c) and Savchyn et al (2023), and a structural block diagram of this algorithm is provided in Savchyn (2022b).…”

Section: ) Rotation Poles and Distances From Cells To Pole Determinationmentioning

confidence: 99%

“…The number of continuous GNSS stations varies from 4 (іn 1995) to 53 (in 2016), while the duration of measurements varies from less than five years (FIE0, ARVL, SMR5, SGP5, THRO, and WLRD) to more than 20 years (CAS1, MAW1, SYOG, VESL, DUM1, and CRAR). A detailed description and analysis of the data are presented in Savchyn et al (2023).…”

Section: ) Moment Of Inertia and Angular Momentum Determinationmentioning

confidence: 99%

“…Lobkovsky and Kerchman (1991) note that this theorem in geodynamics gave the concept of plate tectonics a quantitative character and opened the way for theoretical geology to gradually transform from a descriptive science into an exact scientific discipline. Modern methods of using GNSS measurements to study the rotation poles of tectonic plates are presented in Marchenko et al (2012), Altamimi et al (2017), Tretyak et al (2018, Jagoda (2021), Savchyn (2022a;2022b;2022c), andSavchyn et al (2023). In fact, using GNSS measurements, it is possible to find the location of the pole of rotation to fix the tectonic plate in space, as well as the angular velocity to understand the dynamics of its movement around this location.…”

Section: Introductionmentioning

confidence: 99%

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Tectonic plates moment of inertia and angular momentum determination: the case of the Antarctic plate

Savchyn,

Tretyak

2023

UAJ

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The main goal of this study is to develop and test an algorithm for determining the moment of inertia and angular momentum of a tectonic plate based on the processing of time series of daily solutions of continuous GNSS (Global Navigation Satellite System) stations. The proposed algorithm consists of four consecutive stages: reformatting data to the internal format; dividing the plate into cells and determining their masses; determining the rotation poles and distances from cells to the poles; calculating the plate's moment of inertia and angular momentum. The algorithm uses freely available time series of daily solutions from continuous GNSS stations or any other data prepared in a similar format. The algorithm is tested for determining the moment of inertia and angular momentum of the Antarctic plate based on the processing of time series of daily solutions of continuous GNSS stations for the period 1995-2021. It is confirmed that the Antarctic Plate's rotation poles, moment of inertia, and angular momentum are dynamic parameters. However, additional calculations and in-depth comprehensive analysis are required to determine the causes of such dynamics. As a result of comparing, the dynamics of changes in the Antarctic Plate's rotation poles partially compensate for the unevenness of the Earth's rotation to keep the angular momentum of the Earth constant.

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